diff --git a/hardware/arduino/sam/libraries/SPI/SPI.cpp b/hardware/arduino/sam/libraries/SPI/SPI.cpp
index 9517e22263a..4307d2ca2a7 100644
--- a/hardware/arduino/sam/libraries/SPI/SPI.cpp
+++ b/hardware/arduino/sam/libraries/SPI/SPI.cpp
@@ -25,6 +25,7 @@ void SPIClass::begin() {
 	setClockDivider(BOARD_SPI_DEFAULT_SS, 21);
 	setDataMode(BOARD_SPI_DEFAULT_SS, SPI_MODE0);
 	setBitOrder(BOARD_SPI_DEFAULT_SS, MSBFIRST);
+	setTransferWidth(BOARD_SPI_DEFAULT_SS, SPI_WIDTH_8);
 }
 
 void SPIClass::begin(uint8_t _pin) {
@@ -41,6 +42,7 @@ void SPIClass::begin(uint8_t _pin) {
 	setClockDivider(_pin, 21);
 	setDataMode(_pin, SPI_MODE0);
 	setBitOrder(_pin, MSBFIRST);
+	setTransferWidth(_pin, SPI_WIDTH_8);
 }
 
 void SPIClass::init() {
@@ -73,18 +75,28 @@ void SPIClass::setDataMode(uint8_t _pin, uint8_t _mode) {
 	mode[ch] = _mode | SPI_CSR_CSAAT;
 	// SPI_CSR_DLYBCT(1) keeps CS enabled for 32 MCLK after a completed
 	// transfer. Some device needs that for working properly.
-	SPI_ConfigureNPCS(spi, ch, mode[ch] | SPI_CSR_SCBR(divider[ch]) | SPI_CSR_DLYBCT(1));
+	SPI_ConfigureNPCS(spi, ch, mode[ch] | width[ch] | SPI_CSR_SCBR(divider[ch]) | SPI_CSR_DLYBCT(1));
 }
 
+void SPIClass::setTransferWidth(uint8_t _pin, uint8_t _width) {
+	uint32_t ch = BOARD_PIN_TO_SPI_CHANNEL(_pin);
+	width[ch] = _width<<8;
+	// SPI_CSR_DLYBCT(1) keeps CS enabled for 32 MCLK after a completed
+	// transfer. Some device needs that for working properly.
+	SPI_ConfigureNPCS(spi, ch, mode[ch] | width[ch] | SPI_CSR_SCBR(divider[ch]) | SPI_CSR_DLYBCT(1));
+}
+
+
 void SPIClass::setClockDivider(uint8_t _pin, uint8_t _divider) {
 	uint32_t ch = BOARD_PIN_TO_SPI_CHANNEL(_pin);
 	divider[ch] = _divider;
 	// SPI_CSR_DLYBCT(1) keeps CS enabled for 32 MCLK after a completed
 	// transfer. Some device needs that for working properly.
-	SPI_ConfigureNPCS(spi, ch, mode[ch] | SPI_CSR_SCBR(divider[ch]) | SPI_CSR_DLYBCT(1));
+	SPI_ConfigureNPCS(spi, ch, mode[ch] | width[ch] | SPI_CSR_SCBR(divider[ch]) | SPI_CSR_DLYBCT(1));
 }
 
-byte SPIClass::transfer(byte _pin, uint8_t _data, SPITransferMode _mode) {
+
+byte SPIClass::transfer(byte _pin, uint16_t _data, SPITransferMode _mode) {
 	uint32_t ch = BOARD_PIN_TO_SPI_CHANNEL(_pin);
 	// Reverse bit order
 	if (bitOrder[ch] == LSBFIRST)
@@ -105,7 +117,7 @@ byte SPIClass::transfer(byte _pin, uint8_t _data, SPITransferMode _mode) {
 	// Reverse bit order
 	if (bitOrder[ch] == LSBFIRST)
 		d = __REV(__RBIT(d));
-    return d & 0xFF;
+    return d & (1<<(8+width[ch])-1);
 }
 
 void SPIClass::attachInterrupt(void) {
diff --git a/hardware/arduino/sam/libraries/SPI/SPI.h b/hardware/arduino/sam/libraries/SPI/SPI.h
index 735bd4bf9a5..e4d81b9d789 100644
--- a/hardware/arduino/sam/libraries/SPI/SPI.h
+++ b/hardware/arduino/sam/libraries/SPI/SPI.h
@@ -23,13 +23,25 @@ enum SPITransferMode {
 	SPI_CONTINUE,
 	SPI_LAST
 };
+enum SPITransferWidth {
+	SPI_WIDTH_8,
+	SPI_WIDTH_9,
+	SPI_WIDTH_10,
+	SPI_WIDTH_11,
+	SPI_WIDTH_12,
+	SPI_WIDTH_13,
+	SPI_WIDTH_14,
+	SPI_WIDTH_15,
+	SPI_WIDTH_16
+};
 
 class SPIClass {
   public:
 	SPIClass(Spi *_spi, uint32_t _id, void(*_initCb)(void));
 
-	byte transfer(uint8_t _data, SPITransferMode _mode = SPI_LAST) { return transfer(BOARD_SPI_DEFAULT_SS, _data, _mode); }
-	byte transfer(byte _channel, uint8_t _data, SPITransferMode _mode = SPI_LAST);
+	byte transfer(uint16_t _data, SPITransferMode _mode = SPI_LAST) { return transfer(BOARD_SPI_DEFAULT_SS, _data, _mode); }
+	byte transfer(byte _channel, uint16_t _data, SPITransferMode _mode = SPI_LAST);
+
 
 	// SPI Configuration methods
 
@@ -46,12 +58,14 @@ class SPIClass {
 	// These methods sets a parameter on a single pin
 	void setBitOrder(uint8_t _pin, BitOrder);
 	void setDataMode(uint8_t _pin, uint8_t);
+	void setTransferWidth(uint8_t _pin,  uint8_t _width);
 	void setClockDivider(uint8_t _pin, uint8_t);
 
 	// These methods sets the same parameters but on default pin BOARD_SPI_DEFAULT_SS
 	void setBitOrder(BitOrder _order) { setBitOrder(BOARD_SPI_DEFAULT_SS, _order); };
 	void setDataMode(uint8_t _mode) { setDataMode(BOARD_SPI_DEFAULT_SS, _mode); };
 	void setClockDivider(uint8_t _div) { setClockDivider(BOARD_SPI_DEFAULT_SS, _div); };
+	void setTransferWidth(uint8_t _width) { setTransferWidth(BOARD_SPI_DEFAULT_SS,  _width); };
 
   private:
 	void init();
@@ -61,6 +75,7 @@ class SPIClass {
 	BitOrder bitOrder[SPI_CHANNELS_NUM];
 	uint32_t divider[SPI_CHANNELS_NUM];
 	uint32_t mode[SPI_CHANNELS_NUM];
+	uint32_t width[SPI_CHANNELS_NUM];
 	void (*initCb)(void);
 	bool initialized;
 };